In the process of raising flowers in the family, potted flowers are restricted by the cultivation conditions, improper daily management, yellow leaf phenomenon is easy to occur, lightly affects normal growth, and the whole plant is dead. Therefore, it should be observed and correctly judged during the curing process. To find out the cause of the yellow leaf, take appropriate countermeasures, and quickly correct it.
Too much watering: The long-term wetness of the potting soil causes the roots to suffocate and rot, which can not properly absorb water and fertilizer, causing the yellow leaves to even fall off. It is found that there are yellow leaves should stop watering immediately, loosen the potting soil, put it in a ventilated and dry place, and accelerate the evaporation of water. Watering should adhere to the principle of “see dry, watering and pouringâ€, and do not sprinkle water. In addition, do not spray water on the flowers during the flowering period.
Water shortage: If the water-deficient leaves are drooping, spray water on the leaves immediately to speed up the absorption of water by the plants, then water them in the basin. At this time, pay attention to less watering and let the soil moist. Watering more.
Improper fertilization: long-term in the potted peanuts, long-term no fertilization or insufficient fertilization, will cause yellow leaf phenomenon; excessive application of concentrated fertilizer will burn the roots, affecting water absorption, also cause yellow leaves, can be diluted with water and washed Go to the soil for fat. The lack of fertilizer can lead to the consolidation of the soil, the leaves are yellow, thin, thin, the branches are slender, yellow, tender, and should be fertilized immediately.
Large alkali: Due to the long-term watering of potted plants, the accumulation of saline and alkali in the potting soil will cause the leaves to yellow and fall off in severe cases. The new soil should be replaced or the ferrous sulfate solution should be sprayed on the foliar surface. The fertilized water and the fermented rice water can be sprinkled, and good results can be obtained, but do not apply more.
Air drying: Some air-humid flowers cultivated in the north, such as camellia, orchids, etc., often dry at the tip of the leaves when the air is too dry, the leaves are burnt or the focal spots on the leaves, and the edges are curled and wrinkled to brown. In particular, winter indoors use coal fire, heating and heating areas are heavier. At this time, the water should be sprayed with water similar to room temperature to increase the humidity of the air.
Large flower basin: Large roots and large roots require more water and fertilizer. Small pots can't meet the needs of plant growth. Old leaves are dry and dull, and young leaves are thin. To change the appropriate size of the pot, add 30% humus to the soil to make the flower grow normally.
The branches and leaves are too dense: the foliage grows lush and the long-term untrimmed, so that the inner lychee leaves are insufficiently illuminated, and the yellowing of the leaves appears. The inner lychee should be strengthened to facilitate ventilation and proper fertilization.
Insufficient light: Cultivation of sunny flowers, such as rose, pomegranate, if placed in a place where the light is too weak for a long time, the plant will gradually weaken, the leaves are thin and yellow, no flowering or less flowering. It should be moved to a well-lit area.
Freezing from frost: The yellow leaves of the flowers are affected by freezing, and it is necessary to enter the room to keep warm and strengthen the cold-resistant exercise of potted flowers in advance.
Pest and disease hazards: After being infected with mosaic virus, the plaques embedded in yellow and green on the leaf surface should be prevented, sprayed in time and given sufficient light and ventilation. Aphids, spider mites, etc. absorb nutrients and water in the back of the leaves, so that the leaves are yellow and even the leaves of the whole plant are withered and shed, and the pests can be recovered in time.
Other flowers are poisoned by toxic gases. Spraying high concentrations of pesticides to control pests and diseases can cause yellowing, scorching, or even death of the leaves or leaves. Therefore, it is necessary to remove air pollution sources or plant anti-pollution plants and use pesticides reasonably.
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